baber/WOPTO huggingface dataset:
Patent GB-445347-A (GB)
Title: Improvements in or relating to electro-magnetic brakes
IPC: B60T13/74
Filed: 1934-09-29
Abstract: 445,347. Electric brakes. LEITNER, H., 408, Abbey House, Victoria Street, Westminster. Sept. 29, 1934, Nos. 27957 and 30300. [Class 103 (i)] [See also Group XXXV] An eddv-current brake comprises an unwound disc or a cylindrical armature 7 and a field magnet having opposed poles 2, 4 formed by overlapping portions of the cone so that the joint 11 is embraced by the excitation coil and extends at least over two thirds of the length of the coil. The engaging surfaces of the two parts 1, 8 are of tapering form and are forced together by hydraulic or other means and the parts may also be screwed together. Two field magnets may be joined back to back as shown in Fig. 1. In a modification, the poles 2, 4 extend towards one another and overlap one another over the coil. Radiating fins 36 and fans are used to assist cooling. In the modification shown in Fig. 9, the poles are separately excited and comprise a number of units mounted on a spider 30. Each unit comprises two poles 31, 32 having interfitting tapering cone portions 38, 39 secured by a nut 41. A further set of poles may be secured to the other side of the spider or the cone portions may have poles. projecting from each side so as to form a twin valve brake, the cones being mounted on a tubular carrier. More than one set of magnets may be mounted at different radii. Specifications 418,443 and 418,496 are referred to.
Patent GB-1273297-A (GB)
Title: Fluid flow control valve
IPC: F15B13/043
Filed: 1970-06-09
Abstract: 1,273,297. Two-stage servovalves. SANDERS ASSOCIATES Inc. June 9, 1970 [July 1, 1969], No. 27960/70. Heading G3P. A two-stage servovalve for providing a flowrate to a servomotor independent of the load on the latter has a first-stage spool 15 adapted to connect high-pressure supply line 23 to either of the control lines 21, 22 of a pair of second-stage spools 41, 41' the space 53 between which receives fluid from line 23 via reducing valve 39. In operation, when spool 15 raises the pressure in line 21 or 22, the corresponding spool 41 or 41' shifts to connect the respective line 21, 22 to servomotor supply line 33 (spool 41) or 34 (spool 41') via a flow-path through the spool comprising a central, axial passage and a diametral passage, whereby control fluid eventually flows to line 33 or 34 at a rate sufficient to reduce the control pressure in line 21 or 22 to the pressure in space 53, the rate being independent of the load on the servomotor. The flow of control fluid is supplemented by a proportional flow from port 37 or 37' to line 33 or 34. The non-pressurized side of the servomotor is connected to exhaust by the operative spool 41 or 41'. In a modification, Fig. 4, the first stage is a flapper-nozzle unit 64-67 and the relay spools 71, 71' are arranged in opposing relation such that spool 71 controls supply and exhaust of the servomotor 77 when the flapper moves leftwards and spool 71' controls the servomotor when the flapper moves rightwards. In Fig. 6, a single second-stage spool 111 is used having a central land 114 co-operable with opposite ends of annular member 121 having, at each end, a pair of small radial slots (124) allowing land 114 to connect one of control lines 98, 99 to one side of actuator 106, and a set of larger radial slots (131-134) allowing land 114 to connect supply port 107 to the same side of actuator 106. In each case, a small deadband can be introduced by springs such as 117, 118 acting on the second stage spool(s). The pressure reducing valve 79 or 109 can be responsive to the pressure in control line 86 or 98 to maintain the pressure at supply port 78, 107 equal to the control pressure.
Patent GB-203928-A (GB)
Title: Improvements to leaf spring buffers on railway waggons and the like, by the addition of helical springs
IPC: B61G11/06
Filed: 1922-10-16
Abstract: 203,928. Snell, F. H., and Priestley, H. Oct. 16, 1922. Buffers. - In a buffing arrangement of the type in which the buffer shanks of the side buffers bear against the ends of a transverse leaf spring, each buffer shank is stepped and operates two helical springs by means of shoulders on the shank, the smaller spring coming into action after the initial shock has been taken up by the leaf spring and larger helical spring. The buffer shank comprises threestepped portions a, c, and h, of which a bears. against a helical spring e and h against a leaf spring g. A smaller helical spring f is housed in the buffer casing and is compressed by the stepped portion c after the initial shock has been taken up by the helical spring e and leaf spring g.
Patent GB-228624-A (GB)
Title: Improvements in filters
IPC: B01D29/00
Filed: 1923-11-07
Abstract: 228,624. Betteridge, J. C., and Cox, H. J. Nov. 7, 1923. Filters having sheet filtering-materials.-A cylindrical filter basket 8 rests on a seating 4 in a casing 1, having an inlet 2 and outlet 3, and can be rotated by means of the spindle 7 for cleaning by means of a brush or scraper 17 fixed to the casing by bolts 18. The basket is secured between discs 5, 9, the disc 5 being pressed ou to the seating by a spring 15. The brush or scraper may be arranged to rotate, the basket being kept stationary.
Patent GB-1330813-A (GB)
Title: Pivotal lever mountings including pinless hinges
IPC: B60T13/567
Filed: 1972-06-15
Abstract: 1330813 Pinless hinge GENERAL MOTORS CORP 15 June 1972 [30 June 1971] 28075/72 Heading E2F [Also in Division F2] In a pinless hinge arrangement for mounting a brake pedal lever 28 onto a mounting bracket 16, the upper end of the lever 28 is provided with a circumferential open-ended pintle roll 68 pivotally mounted in a circumferential open-ended knuckle roll 60 provided on the bracket 16. The rolls 60, 68 have a constant radius of curvature of more than 180. and the tangential portions 74 and 42 of the rolls are shaped in the manner shown in Fig. 2 such that the centres of the rolls are co-incident at 62 in the assembled position shown in full lines in Fig. 2. The pintle roll 68 is pivotally retained with the knuckle roll 60 between opposed side plates (not shown) on the hinge assembly. A flexible sheet bushing 82 of a material having a low coefficient of friction is inserted between the opposed faces of the rolls. As shown in Fig. 1, a push rod 26 is connected to the brake pedal lever 28 to actuate a brake pressure device (e.g. a servoassisted master cylinder 10, 22). When it is desired to disassemble, the pivotal connection, the push rod 26 is disconnected and the brake pedal lever 28 is moved to the position shown in the ghost lines in Fig. 2 where upon the lever may be disconnected from the bracket 16.
Patent GB-264951-A (GB)
Title: Improvements in or relating to joints or hinge connexions for windscreens and the like
IPC: B60J1/04
Filed: 1925-11-09
Abstract: 264,951. Pearce & Sons (Brassfounders), Ltd., G. W., and Jones, A. E. E. Nov. 9, 1925. Pivoting adjustments comprise a solid pivot rod of differential diameter, or tube carrying a windscreen or like member and rotatably mounted upon the major diameter of the rod, a loose piece in a facial cavity of the minor diameter of the rod, a split sleeve within the tube embracing the loose piece and the minor diameter of the rod, and a hand-screw passing through an elongated slot in the tube and engaging a tapped aperture in the rod with its extremity adapted to press the loose piece into locking engagement with the split sleeve and outer tube. As shown, the loose piece c is seated in a recess a<2> of the reduced part a' of the solid pivot a forming part of the bracket b, and the members a', c are embraced by a split sleeve d provided with a notch d<2> to engage a projection a<5>. The parts are frictionally locked by a hand-operated screw f that passes through an elongated slot e<2> in the outer sleeve e carrying the screen e<1>, an aperture d<3> in the sleeve d, and a tapped hole a<6> in the part a<1>, the handle being turned to force the part c to bind the sleeve and tuba together. The sleeve is prevented from axial displacement by the shoulder a<3> and a grub-screw a<4>. Specification 264,952 is referred to.
Patent GB-965902-A (GB)
Title: Improvements relating to the manufacture of transparent luminescent screens
Inventor: TURNER GEORGE CHRISTIE
IPC: H01J9/22
Filed: 1959-08-18
Abstract: Method of manufacturing a transparent luminescent screen comprises forming, e.g. by vacuum coating, a transparent layer of the base material of a phosphor on a transparent supporting plate, effecting contact between the whole of the free surface of the layer and a mass of powder of the phosphor or a mixture of powders of the phosphor base material and the activator which can be in excess, and heating the powder at such a temperature and for such a time as to cause activator ions to diffuse into the appropriate lattice sites in the transparent layer to cause activation thereof.  A quartz supporting plate can be placed on or in a bed of phosphor powder with the transparent layer facing downwards.  Phosphor base modifying constituents can be introduced during the formation of the transparent layer of base material on the supporting plate or can be introduced by diffusion from the mass of phosphor powder.  In one example magnesium potassium fluoride is the base material, zinc fluoride is the base modifying constituent and manganese is the activator and heating is at 800 DEG  C. for 2 minutes.  In another example the phosphor base material is zinc sulphide and the activator is silver and heating is at 850 DEG C. for 5 minutes.
Patent GB-1140463-A (GB)
Title: Block polyester polyamides
Inventor: DUXBURY FREDERICK KEITH
IPC: C08L67/00
Filed: 1965-07-02
Abstract: 1,140,463. Block polyesteramides. IMPERIAL CHEMICAL INDUSTRIES Ltd. 27 Sept., 1966 [2 July, 1965; 13 May, 1966], Nos. 28133/65 and 21414/66. Heading C3R. Elastomeric block polymers containing polyamide and polyester segments are made by copolymerizing in the presence of an esterification or ester-interchange catalyst either (1) a mixture of a polyamide with a linear or substantially linear polyester having a melting point below 60 C. or with components or components which give rise to such a polyester, or (2) a mixture of a polyamide-forming component or components with a polyester as defined in (1). The polyamide is linear or substantially linear and is obtainable by the polycondensation of either (a) an aliphatic or araliphatic diamine and an aliphatic dicarboxylic acid of formula HOOC-A-COOH (where A is a direct link or a C 1-14  alkylene group) or an aromatic or cycloaliphatic dicarboxylic acid, or (b) an aliphatic aminocarboxylic acid of formula HOOC-B-NH 2  (where B is a C 2-12 alkylene group) or a lactam thereof; the alkylene groups in (a) and (b) preferably being unsubstituted or methyl - substituted polymethylene groups. The polyesters are preferably those obtainable from a straight-chain or branched-chain alkylene glycol, a cycloaliphatic glycol or di- or tri-ethylene glycol and a dicarboxylic acid of formula HOOC-D-COOH (where D is a direct link or a C 1-14  straight- or branched-chain alkylene group) but polyesters of hydroxycarboxylic acids or their lactones may also be used. Specified polyamides are polyhexamethylene adipamide, polyhexamethylene sebacamide, polyhexamethylene oxamide, polyhexamethylene terephthalamide, polydodecamethylene terephthalamide, polycaprolactam, polyhexamethylene sebacamide modified by a small amount of bis-hexamethylene triamine, a copolyamide of hexamethylene diamine, sebacic acid and terephthalic acid, and a copolyamide of oxalic acid, hexamethylene diamine and aminocaproic acid. Specified polyesters are poly-(2:2 - dimethyl-1: 3-propanediol sebacate), a copolyester of sebacic acid, ethylene glycol and 1 : 2-propanediol and a mixture of poly-(2 : 2-dimethyl-1 : 3-propanediol sebacate) and poly-(2 : 2-dimethyl-1 : 3- propanediol adipate). The polyamide segment preferably has a molecular weight of 400 to 20,000 and the polyester segment a molecular weight of 1000 to 5000. The segments are preferably combined together in a weight ratio of 20 : 80 to 50 : 50. Reaction between the polyamides and polyesters or their precursors is preferably effected at 200 to 300 C., possibly in the presence of a glycol, an at least trifunctional acid, amine or alcohol (e.g. trimesic acid, bis-hexamethylene triamine, glycerol or pentaerythritol) or an anti-oxidant (e.g. triphenyl phosphite), a heat- or light-stabilizer, a viscosity stabilizer or a delustrant.
Patent GB-487120-A (GB)
Title: Improvements in lathe and like tool holders
IPC: B23B29/14
Filed: 1937-10-16
Abstract: 487,120. Tool - holders. AKTIEBOLAGET M. HOLMQUIST. Oct. 16, 1937, No. 28246. Convention date, Dec. 22, 1936. [Class 83 (iii)] A lathe &c. tool-holder is composed of a member 1, Fig. 1, adapted to be adjusted vertically and to be clamped for instance on to a holder block, and of a member 2 carrying the tool, which latter member is mounted for rotation in a vertical plane in the first-mentioned member and connected therewith by means of a leaf spring 18, characterized in that the spring is rigidly connected with one of the two parts and loosely held in the other part. The tool 3, Fig. 5, is clamped by an adjustable plate 25 in undercut grooves provided in the clamping plate and rotatable part 2; the latter rotates about a conically-headed bolt 14 and the spring 18 is rigidly connected to this part, its other end loosely engaging a slot formed in a rib provided on the member 1. Specification 487,121 is referred to.
Patent GB-838835-A (GB)
Title: Cobalt alloy
IPC: C22C19/07
Filed: 1958-09-03
Abstract: An alloy having good corrosion resistance and strength at high temperatures has a composition within the following range in per cent by weight. .Cr.15 -30 .W.5 -15 .Ta.0.5-20 .C.0.1- 1.3 .B.0.01-0.2 .Co and impurities the balance.. The alloy may also contain one or more of the following elements: Nb up to 3.0, not exceeding half the Ta content; Mo up to 3.5, not exceeding half the W content; Si up to 1.5; Fe and/or Ni up to 5.0.  Mn should not exceed 2.0 and the contents N, H, Sn and Pb should be kept as low as possible. Deoxidizers such as Ca and Mg should not exceed 0.5.  The alloy may be used as parts of gas turbines and other internal combustion engines, heat exchangers, linings for retorts and other chemical and metallurgical apparatus, tubes and glass working tools.
Patent GB-834669-A (GB)
Title: Improvements in or relating to cathode ray tube flying spot scanners
Inventor: URRY DENIS EDWARD
IPC: H04N5/257
Filed: 1956-09-17
Abstract: 834,669. Photo-electric particle counters. RANK CINTEL Ltd. Sept. 17, 1957 [Sept. 17, 1956], No. 28346/56. Drawings to Specification. Class 40 (3). [Also in Group XL (c)] In photo-electric particle counting apparatus using a flying-spot scanner the cathode-ray tube (C.R.T.) beam current is alternated at a 1 : 10 duty cycle between a value greater than that which, if continuously in operation, would cause C.R.T. screen damage and zero. Specification 778,288 is referred to.
Patent GB-1196733-A (GB)
Title: Improvements in or relating to Heat Exchangers.
Inventor: WILKINS PHILIP ARTHUR
IPC: F24C15/00
Filed: 1966-06-24
Abstract: 1,196,733. Plate heat exchangers. WILKINS & MITCHELL Ltd. 31 July, 1967 [24 June, 1966], No. 28363/66. Heading F4S. [Also in Division B3] A hollow-plate heat exchanger comprises two identical corrugated plates 11, 12 which converge towards and are in contact with one another at one end 13 of the heat exchanger and which are kept spaced apart by means of a curved wall 14 at the other, each of which plates includes adjacent first and second portions having respectively first and second corrugations, the first corrugations having a smaller pitch and depth than the second corrugations (see Figs. 3-4, not shown) and the crests or troughs of some of the first (i.e. the smaller) corrugations being continuations respectively of the crests or troughs of second (i.e. the larger) corrugations, all said corrugations and the transistions between said portions being such that the distance across the plate, measured along a surface thereof, is substantially constant in any cross-section perpendicular to the lengths of the corrugations, said plates being arranged so that the space between the plates diverges in the transistion zone between said first portions and said second portions, i.e. between W 1 -W 2  and W 8 -W 4 . As shown in Fig. 1, the first portion 23 contains an alternating pattern of V-shaped crests 24 and flat-bottomed troughs, whereas the second portions 21, 22 have two sets of alternating crests both lower than the crests of the first portion (see Fig. 4). In operation, a side wall 20 is apertured to allow for the entry of a gas burner (aperture 37) and for the escape of flue gases (aperture 38). A method of corrugating the plates is described (see Division B3).
Patent GB-326130-A (GB)
Title: Improvements relating to the twisting of rayon threads
IPC: B65H49/26
Filed: 1928-10-03
Abstract: 326,130. Wade, H., (Du Pont Rayon Co.). Oct. 3, 1928. Spinning and twisting machines with twisting arrangements at delivery; spindle apparatus. - Relates to apparatus of the type in which additional twist is imparted to artificial silk thread which has been spun in cake form into a spinning box by removing the cake from the box and placing it on to a bobbin in a throwing machine, the bobbin having a number of vanes adapted to be collapsed for insertion into the cake and then expanded and clamped in the expanded position to hold the cake during the throwing process. The expansible bobbin comprises a spindle 1, Fig. 3, having a plate 2 keyed thereto by tongues 3 engaging flats 4, the thread-carrying surface being formed by members 13 secured at 11, 12 in the end flanges 9, 10 of a sleeve 6, each member 13 having a lug 16 engaging a slot 17, Fig. 2, whereby on turning the sleeve 6 the members 13 are guided to the desired radial position. The members 13 are secured in position by a lock-nut 7 bearing against the flange 10.
Patent GB-748873-A (GB)
Title: Method of securing work-pieces on supports
IPC: C14B1/26
Filed: 1952-11-12
Abstract: 748,873. Releasable fastenings. BECHTOLD, K. Nov. 12, 1952, No. 28503/52. Drawings to Specification. Class 44. [Also in Group VIII] A naturally dry workpiece, e.g. a hide, is secured to a support by locating said workpiece thereon with a liquid such as water between the workpiece and the support and freezing the liquid. If desired, the workpiece may be mechanically fastened to the support before freezing. Cooling may be by means of elements in or on the workpiece or by transmission from the support; if desired it may be continued during an operation on the workpiece, to prevent premature melting. The workpiece may be removed by melting the frozen liquid and/or by tearing off and/or by scraping. In the illustrated embodiment, fur skins are placed successively on a rotating drum which constitutes the evaporator of a refrigerating plant, and pass a series of devices for treating and removing . the hair from the skin. Specification 572,367, [Group VIII], is referred to.
Patent GB-920851-A (GB)
Title: Chromono-xanthone and thiochromono-thioxanthone pigments
Inventor: ROHLAND WERNER
IPC: D06P1/44
Filed: 1960-08-18
Abstract: A red wallpaper colour is made by mixing with a glue solution the precipitate obtained by adding barium chloride solution to a suspension made by adding sodium carbonate solution and a pigment of the formula:-  <FORM:0920851/III/1> where X is oxygen, to a suspension of heavy spar in aluminum sulphate solution.  Printing inks contain the pigment of the above formula where X is oxygen or sulphur and the 4- and 8-positions may also be substituted by chlorine, having a particle size between 0,01 and 0,5m .  In examples (1) a pigment of the above formula is ground with aluminium hydroxide and linseed oil varnish, and (7) an aqueous paste of a pigment of the above formula is mixed with heavy spar, aluminium sulphate and sodium carbonate solution, barium chloride solution is added and the precipitated product is mixed with a glue solution.ALSO:Nitrocellulose, acetyl cellulose, viscose, linear polyesters and polyamides, polyester resins, phenoplasts, aminoplasts, polyurethane lacquers, polyolefines such as polyethylene, polystyrene, polyvinyl chloride, polyacrylonitrile and rubber are coloured red with a pigment of the general formula:- <FORM:0920851/IV(a)/1> where X is oxygen or sulphur and 4- and 8-positions may also be occupied by chlorine, having a particle size between 0,01 and 0,5m .  In examples a pigment of the above formula is ground or mixed with, (8), a nitrocellulose lacquer containing pyroxylin, dibutyl phthalate, benzyl butyl phthalate, a synthetic resin obtained from cyclohexanone by treatment with sodium hydroxide, butyl acetate, methyl acetate and toluene and optionally, inorganic pigments and fillers; (2), a stoving lacquer of a coconut oil alkyd resin, urea-formaldehyde resin, xylene and butanol; (3), an unsaturated polyester resin and stirred with monostyrene, cyclohexanone peroxide, dibutyl phthalate, cobalt naphthenate and silicone oil solution in xylene; (4), polyvinyl chloride, di-iso-octyl phthalate and titanium dioxide (rutile); (5), polystyrene granulate; and (6) pale crepe, sulphur, stearic acid, 2-mercaptobenzthiazole, hexamethylene tetramine, zinc oxide, chalk and titanium dioxide (anatase) followed by vulcanization.ALSO:The invention comprises pigments of the formulae:- <FORM:0920851/IV(a)/1> <FORM:0920851/IV(a)/2> and <FORM:0920851/IV(a)/3> and pigments of the general formula:- <FORM:0920851/IV(a)/4> where X is oxygen or sulphur and in which the 4- and 8-positions may also be occupied by chlorine, having a particle size between 0,01 and 0,5m .  The pigments are made by reacting 2:5 - dichlor - 1:4 - benzoquinone - 3:6 - dicarboxylic acid esters with 4-chloro- or 2:4-dichlorophenol or -thiophenol, conversion of the diaryl ethers or thioethers by reduction into the dihydroxy compounds followed by saponification and ring closure.  The pigments may be converted to the finely-divided form by acidpasting or grinding.  The pigments colour a wide variety of materials in red shades.
Patent GB-326754-A (GB)
Title: Improvements in and relating to means for sharpening safety razor blades
IPC: B24D15/10
Filed: 1929-09-20
Abstract: 326,754. Harrison, N. Sept. 20, 1929. Stropping-apparatus; wheels and other tools. -A holder for sharpening safety razor blades on a concave sharpening member comprises a face plate a, which is preferably convex, to contact with the blade x, and which carries two or more projections c passing through apertures in the blade, such projections being of definite length so as to contact, with the sharpening member and ensure the correct sharpening angle. The projections are preferably curved to agree with the curvature of the sharpening member. Fig. 2 shows a simple form in which the holder is directly manipulated by means of a handle b. In the construction shown in Figs. 5 and 6, a cylindrical sharpening member x<1> is used and the face plate a<1> is carried on arms e engaging, at their upper ends, a spindle f carried by rollers g and provided with a handle b' by means of which the device is rotated inside the member x' to sharpen the blade. Spring pressure is applied to the blade by means of a compression spring h placed between the spindle and a cross member e<2>, slots e<1> in the arms permitting relative movement of the spindle.
Patent GB-926326-A (GB)
Title: Preparation of dipyridylium quaternary salts
Inventor: JUBB ANTHONY HOWDEN
IPC: C07D471/14
Filed: 1959-08-21
Abstract: Dipyridylium quaternary salts of the formula:  <FORM:0926326/IV(a)/1> where X- is an anionic radical are obtained by heating 2,21-dipyridyl with an excess of an ethylene glycol diester at a pressure above atmospheric and at a temperature above the boiling point of the diester.  The preparation of the dibromide salt is described.